{"id":239295,"date":"2026-06-19T02:22:29","date_gmt":"2026-06-19T07:22:29","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/06\/circular-polarization-could-cut-laser-backscatter-in-fusion-experiments"},"modified":"2026-06-19T02:22:29","modified_gmt":"2026-06-19T07:22:29","slug":"circular-polarization-could-cut-laser-backscatter-in-fusion-experiments","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/06\/circular-polarization-could-cut-laser-backscatter-in-fusion-experiments","title":{"rendered":"Circular polarization could cut laser backscatter in fusion experiments"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/circular-polarization-could-cut-laser-backscatter-in-fusion-experiments2.jpg\"><\/a><\/p>\n<p>Experiments at Lawrence Livermore National Laboratory\u2019s National Ignition Facility (NIF) require breathtaking precision. Each of the 192 lasers is focused to a width of a few millimeters to enter a 3-millimeter hole at the top or bottom of a 2-centimeter (0.8-inch) gold canister known as a hohlraum.<\/p>\n<p>As they enter, the beams intersect in plasma and transfer power, a process known as crossed-beam energy transfer (CBET). In designing a NIF inertial confinement fusion (ICF) experiment, scientists precisely tune the beams\u2019 wavelengths to balance power via CBET and achieve better symmetry.<\/p>\n<p>Small changes in wavelength have delivered big results\u2014CBET is one key factor in achieving ignition on NIF. But what would be the effect of a more significant change in the laser architecture, namely its polarization state? LLNL scientists have calculated that this change would make the <a href=\"https:\/\/str.llnl.gov\/past-issues\/aprilmay-2024\/new-dimension-glass\" target=\"_blank\">optics more resilient to filamentation damage<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Experiments at Lawrence Livermore National Laboratory\u2019s National Ignition Facility (NIF) require breathtaking precision. Each of the 192 lasers is focused to a width of a few millimeters to enter a 3-millimeter hole at the top or bottom of a 2-centimeter (0.8-inch) gold canister known as a hohlraum. As they enter, the beams intersect in plasma [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1497],"tags":[],"class_list":["post-239295","post","type-post","status-publish","format-standard","hentry","category-energy"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/239295","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=239295"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/239295\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=239295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=239295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=239295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}